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How do you figure out if a trait is dominant or recessive without making an experiment?
Wiki User
∙ 14y ago
research and making a chart or pedigree are tools you can use if you don't consider them experiments.
Wiki User
∙ 14y ago
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What happens to A trait controlled by a dominant gene?
yes, if two Bb parents have kids, there is a 3:1 ratio that their children will show a dominant trait (BB Bb Bb bb). For multiple alleles (3 or more) it gets a little more complicated. Some traits, like height, have 1000's of genes affecting them. Consult your biology teacher for more information.Yes. Because to have a dominant trait you can have two dominant alleles or just one dominant and one recessive (because a dominant allele negates the effect of a recessive allele.) To get a recessive trait it takes two recessive alleles as oppose to a dominant trait where it takes only 1 to have a dominant trait. Therefore Dominant traits are more common.
Are dominant or recessive alleles easier to remove by selection?
Natural selection favors whatever allele provides a selective advantage, so in theory it can operate on either. However, if a recessive allele provides an advantage it will soon shift and become the dominant allele, so it could be argued that natural selection favors dominant alleles. This is only partly true. A dominant gene always has some effect on the characteristics of the organism, even if the owner only has one of them. A recessive gene only affects the characteristics if there is no equivalent dominant gene to mask the effect. If both parents possess the recessive gene there is a chance the offspring will have two of them and this will show in their characteristics. When this happens, natural selection operates on the recessive gene. Much of the time, a recessive gene is present but natural selection does not affect it because there is a dominant gene that masks the effect. If natural selection favours the recessive gene, the dominant gene will quite quickly disappear from the population. This does not make the recessive gene 'dominant' it's just tht there's no longer any competition. If selection favours the dominant gene however, the recessive gene can linger in the population for much longer, because even when it is present, it is not selected against for most of the time. That is why conditions like heamophilia survives for a long time in humans, and you suddenly discover a white deer after many years in a herd of brown deer.
What letters represent the alleles?
Dominant AllelesUsually dominant alleles are represented as capital letters, whereas recessive alleles are represented by the lowercase letter. Presumably, the capital letter will help you remember which is which -- dominant correlates with capital. However, you can assign alleles whatever letter, number, or symbol you want - as long as it produces the same genotype and phenotype ratio. The symbols/letters that are created for Punnett Squares or another process are purely for organizational purposes. Think of it this way: if you have a heterozygous organism that mates with a homozygous organism of the same species, how will you find the genotypes and phenotypes of the offspring? Well, you certainly aren't going to figure it out abstractly in your head. Assigning letters to dominant/recessive alleles is just to keep track of where the alleles are possibly going and the results. If you want the dominant allele to be "R" and the recessive allele to be "r", then that's perfectly acceptable. And if you want to represent the dominant allele with a Batman symbol and the recessive allele with a radioactive symbol, then that's fine too... as long as you know that the Batman symbol represents the dominant allele and the radioactive allele the recessive.
Why are models necessary in science?
so you can see a visual of the experiment your trying to figure out, but it's not going to be that precise (:
What experiment method did gregor Mendels use during his study of inheritance?
Gregor Mendels goal was to figure genetics
In which offspring does a dominant trait appear?
if a trait is recessive, it can only be expressed if its other trait is recessive as well. If the other trait in the genotype is dominant, it will block the recessive factor. But if both are recessive, they will be able to be seen in the offspring.
What happens to A trait controlled by a dominant gene?
yes, if two Bb parents have kids, there is a 3:1 ratio that their children will show a dominant trait (BB Bb Bb bb). For multiple alleles (3 or more) it gets a little more complicated. Some traits, like height, have 1000's of genes affecting them. Consult your biology teacher for more information.Yes. Because to have a dominant trait you can have two dominant alleles or just one dominant and one recessive (because a dominant allele negates the effect of a recessive allele.) To get a recessive trait it takes two recessive alleles as oppose to a dominant trait where it takes only 1 to have a dominant trait. Therefore Dominant traits are more common.
Are dominant or recessive alleles easier to remove by selection?
Natural selection favors whatever allele provides a selective advantage, so in theory it can operate on either. However, if a recessive allele provides an advantage it will soon shift and become the dominant allele, so it could be argued that natural selection favors dominant alleles. This is only partly true. A dominant gene always has some effect on the characteristics of the organism, even if the owner only has one of them. A recessive gene only affects the characteristics if there is no equivalent dominant gene to mask the effect. If both parents possess the recessive gene there is a chance the offspring will have two of them and this will show in their characteristics. When this happens, natural selection operates on the recessive gene. Much of the time, a recessive gene is present but natural selection does not affect it because there is a dominant gene that masks the effect. If natural selection favours the recessive gene, the dominant gene will quite quickly disappear from the population. This does not make the recessive gene 'dominant' it's just tht there's no longer any competition. If selection favours the dominant gene however, the recessive gene can linger in the population for much longer, because even when it is present, it is not selected against for most of the time. That is why conditions like heamophilia survives for a long time in humans, and you suddenly discover a white deer after many years in a herd of brown deer.
Is hemophilia co dominant or dominant?
It is very much recessive with only one exception, which is that there is a large portion of women who simply carry the trait but dont actually have it. If you are to procreate with a female carrier than your chances of having a hemophiliac child are still not very high. You can find all the info you need by using a Punnett Square method to figure out the chances of hemophiliac children with 2 parents.
The color of a dogs coat is the dog's?
no, there are dominant and recessive aelles that come for both or eather or. Use a punnett square from His/Her parent to figure out your dogs parents p of spring.
What is the dominant chimp called?
The dominant figure is always the "alpha" male.
What letters represent the alleles?
Dominant AllelesUsually dominant alleles are represented as capital letters, whereas recessive alleles are represented by the lowercase letter. Presumably, the capital letter will help you remember which is which -- dominant correlates with capital. However, you can assign alleles whatever letter, number, or symbol you want - as long as it produces the same genotype and phenotype ratio. The symbols/letters that are created for Punnett Squares or another process are purely for organizational purposes. Think of it this way: if you have a heterozygous organism that mates with a homozygous organism of the same species, how will you find the genotypes and phenotypes of the offspring? Well, you certainly aren't going to figure it out abstractly in your head. Assigning letters to dominant/recessive alleles is just to keep track of where the alleles are possibly going and the results. If you want the dominant allele to be "R" and the recessive allele to be "r", then that's perfectly acceptable. And if you want to represent the dominant allele with a Batman symbol and the recessive allele with a radioactive symbol, then that's fine too... as long as you know that the Batman symbol represents the dominant allele and the radioactive allele the recessive.
If a homozygous dominant plant crossed with a homozygous recessive plant what is the genotype and phenotype of their offspring?
If two homozygous plants with contrasting traits are crossed, the expected genotypes for the offspring will be heterozygous. The dominant trait would be expressed, but they'd be carriers for the recessive trait.
What is a dominant figure Athenian politicians?
democradic democracy
What fraction of the cross in figure 10-7 will be recessive for both traits?
1/16
In an experiment a model can help a scientist do what?
Figure out what measurements to make.
The dominant figure of George Washington's administration was?
alex ham/tom jeff
